NDLI: Enhanced Photothermal and Photoacoustic Performance of Graphene Oxide in NIR-II Biowindow by Chemical Reduction

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Enhanced Photothermal and Photoacoustic Performance of Graphene Oxide in NIR-II Biowindow by Chemical Reduction

Content Provider	MDPI
Author	Su, Xiaoye Li, Liantong Cui, Dandan Fang, Wei Shi, Yujiao
Copyright Year	2021
Description	We report on a novel strategy for constructing graphene oxide nanomaterials with strongly enhanced photothermal (PT) and photoacoustic (PA) performance in the near-infrared (NIR)-II biowindow by chemical reduction. Optical spectra clearly reveal that obvious enhancement of optical absorption is observed in the whole NIR wideband from the NIR-I to NIR-II region for chemically reduced graphene oxide (CR-G) nanomaterials, which is mainly arising from the restoration of the electronic conjugation within the graphene oxide sheets and therefore inducing a black-body re-introduction effect of typical graphite-like materials. We experimentally synthesized CR-G samples with different degrees of reduction to demonstrate the efficiency of the proposed strategy. Experimental results show that the PT performance of the CR-G samples is greatly improved owing to the absorption enhancement by chemical reduction in the NIR-II biowindow. Furthermore, both in vitro and in vivo PA imaging of the CR-G samples with different degrees of reduction are performed to demonstrate their enhanced NIR-II PA performances. This work provides a feasible guidance for the rational design of graphene oxide nanomaterials with great potential for PT and PA applications in the NIR-II biowindow by chemical reduction.
Starting Page	2
e-ISSN	23046732
DOI	10.3390/photonics9010002
Journal	Photonics
Issue Number	1
Volume Number	9
Language	English
Publisher	MDPI
Publisher Date	2021-12-21
Access Restriction	Open
Subject Keyword	Photonics Graphene Oxide Chemical Reduction Enhanced Performance Photothermal Photoacoustic Nir-ii Biowindow
Content Type	Text
Resource Type	Article

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